Gang cutter for sheet stock



/Dec. 11 1923.

l H. z. COBB VCYACY CUTTER FOR SHEET STOCK Filed Abm; 29 i920 PatentedDec. 11, 1923.

"new,

Felice HENRY z. connor NEW YORK, N. Y., ASSIGNOR 'ro NEW voaKBnLTINGiAND rack- INe COMPANY, n CORPORATION or NEWfYOraL GANG CUTTER ronSHEETSTOCK.

Applica/cin fued prima 1920. serial No. 377,513.l

To all whom 't'fmaiy concern.'

Be it knownthat I', HENRY Z. COBB, a citizen of the UnitedStates,res1ding at New York. countyof New York, and State of l i'Yorkliave invented new and useful un' Cutter-for Sheet Stock, of whichthe tion. .Y l p This invention relates toa gang cutter for sheet.rubber stock and similar material, `uid more particularly to a `cuttertor sheet sro-ck used in 'air brake and tire hose.

rllie underwriters requirements are very strict in respectto hose of theabove type of hose lmade from calendered" sheet stoel: as distinguishedfrom die formed tubing, as the latter lacks the toughness rrd uniformityof calendered sheet stock.

i The stock is cut into strips' with skived edges, the edges being thenlapped and joined under pressureto form a tube. It 's desirable informing such tubes to omit the use of cement and make the joint merelypressing together the freshly cut edges of the stock. However, in ordertol form a goed joint it is essentialthat the edges be perfectlysmoothand JfreeA from any roughness or` irregularities, and such 4 askived edge is best produced by the use of a draw' cut.

Previous to my invention it has been `customary to manually cut onepiece ata time *from the stock, which a'slow and laboricui: method. lnperformingthisoperation the cutting lines are marked out on the stockwith chalk andV the operator then runs a knife along the marked lines,holding the and accurately cuttingrsheet -stock intoy edges.` i n r v l.v y

,objectl is to providev means whereby the angle of the yskive kbe-Yfollowing is a-'full, clear, and exact descripid in somey cases willpermit only of the `a carriage lAnother Objectis to provide-means'for ncutting sheet stock into str/ips; having skived A further varied.

A further object is wpmide readily@ strips of any desired widthf isAsupported, said carriagebeing provided, with a plurality of cuttingvmeans adapted to A'be moved to vor from vcutting relation with thestock. For a full disclosure yof the .invention reference is had andclaims. .n

'In the drawings, Fig. 1 is a vertical lsectional view through themachine.`

Fig. 2 is a front elevation 'with parts omitted and others broken'away;`l, I' i Fig. 3 is a detail view of one of the cutting devices.

justable means for cutting ,sheet stock into n to thefdetailedcilescriptionl v lReferring to the' drawings there is shown comprisingltriangular side.` frames 1 connected by a brace bar f at the top. Shafts3 and 4L extend between -the nframes at theV ends of their bases andcarry grooved wheels 5 adjacent the frames, which wheels are adapted ,torun r` on `tracks 6 y mounted On the table vor'workbed 7 Mountedv onthel shaft V3 are a'. pair kof rocker frames 8 connected by a brace bar9, the ends of thev rocker frames carrying .rollers 10 and 11' journaledtherein. j The rocker frames and associated rollers are `held inoperativeposition by a pivoted latch k12 adapted to engagethe brace bar9.f

' Journaled in the trames 1 near'their upper portion isa rock shaft13Oneend of which carries outside of the frames an oper` ating crankhandle 14. j Rigidly lconnected to the rock shaft 13 are rock arms 15,in theI present vinstance Vtwo in number, tofeach of' which is pivotallyconnecteda'curved linkV 16, each*v link being in turn pivotally conv-.zk:nected'at itsother end to an attaching mem-A ber 17 havinga threaded'extension 18.' The threaded extensions 18 are adapted to enter verticalslots 19 in a cross bar 20 extending between the framesl 1, and areadjustably connected to the cross bar 2O by means of nuts 21 engagingthe extensions. The. ends.v

of the cross'bar 2Ov are slidably engagedr in' vertical grooves 22 inthe frames 1.

A plurality of cutting devices are ad-A a bolt vhole 27'. which Visdisposedin aligmv ment with the slot 24 when the lugs 26 engagethelgrooves ,23.1, A bolt-28 passes through the hole.27 Vand slot2.4'and a wingnut 29 threaded to the bolt holds the attachr ing member25 .inadjusted position onfthe cross bar 20., A pair of'yolres@vextending.

from a socket member 31 are pivotally connected. to the attaching member25 at 30V and a. bearing sleeve S2 rotatableI in the socket member Slisheld i-n adjustedy position therein by means off a set screw 3B.Slidably fitting inthe bearing sleeve 82 is a shank34 of a knife clampmembensaid shank being prevented from turning in said sleeve by .a key35* slidable in a keyway 3G in the sleeve. Extending., from the shank ofthe clamp member is a ange 37 with which a pivoted latch 38 is adaptedto engage to hold theclamp member in thebearing sleeve. Y two sections39 and40,7 between which the cutter blade141` is removably andadjustably held by means of bolts A42 and nuts 43. Extending from-fthetop ofthe sleeve 31` is a bent rod 44'7 through an openingin the endA ofwhich passes a small eye-bolt 45 ,having an adjusting wing-nut 46threaded thereon, and connected to the eye-bolt is a spring 4? to theot-her end ofy which vis connected a hook 48 adapted to be engaged withthe:

shaft 4. Supported byeach rside frame 1 is a stop ,member 49 forthecross bar 2O,4 said stop member being'secured to the frame by athreaded'extension 50 and nut 51.

Y tending verticallyifrom each stopzmember is an adjustable stop screw52 adapted to contact withrtlieqcros's bar 20 and limititsv downwardmovement.' A stopbarb alsol some means for'moistening thefcuttingdevice. To this end a water reservoir 5T s- The clamp member comprises,

mounted on the cross piece 20 and an outlet manifold 58 extendingbetweenthe frames 1 is in communication with the reservoir by p means of thepipe 58. Leading from this manifold area plurality of4 valvecontrolledflexible.` tubes 59' connectedy towater dief charge means 60 havingslotsvadapted to fit on the blades 41 and through whichl slots thewateris discharged. At theend oppov f site the reservoir 57 the manifold 58is pro-l vided with aventpipe 60.

In operation the end of va sheet of stock passed over theproller 10 andunder the roller 11 to a point below the cutting devices. The hook f48`rof each .cutting device is connected to the shaft-1 4,y and thesof"` crank'14jis operated. tolower thecross bar 20, thereby loweringtheicutting devicesuntil the blades 41"comein contact withk the stock' i61 on the bed 7. lThe-carriageis then drawn alongthe `wforlrnbeudanclvtheblades v41 cutV v.thej stock into strips of a width dependingupon their spacing.. By means off the rollers 10' andl 11- the stock isplaced under af slight tension in advance of.' the blades;

thereby preventing 'any buckling or distor,

tion of the stock infront ofthe blades, and-v i owing to the inclinationof the` bladeyedges with respect to thelineof cut a clean draw' cutclosely approximating that produced by hand is obtained. l l It willbeseen that'by my construction numerous adjustments `are providedv for'varying the ycutting action according. to conmeans of the: clampf`sections Y 49 and 40 the length of thev free, end of Vtheblade may bevaried as also. the' length of,

ditions.

its cutting edgein contactwith the stockgan'd'.

the angle lof the edgefmay be4 changed to vary the draw -cutwithdifferent'stocksand different thicknesses of the sheet. By'means oftherotatable bearing. sleeve.;32. 'of the clamp device and its set-screwtheangle of the skive cut may be varied. adjust-j ingv the tension of thespring 47 by the wingnut 46 the cutting pressure of-the blade on.

the. stock may be varied accordingjto the4 thickness and qualitythereof. By means of" the bolts 28 and wing-nuts 29 any desiredtransverse spacing of the blades may be ob tained. By means of theadjustable ,con` nection between the links16 andcross bar 20 the pointsof. maximumand minimum.

elevation vof the cross barv and i'ts'supported cutting devices as awhole'may be. simultaneously varied. By adjustment y of the screws 52the point'of depressionof the cut-v ting devices as a whole maybelimited. And finally, by adjustmentlof lthefstop bar'58` on.

its mounting the limitof'downwardmovement of thek cutters on theirpivots 30 may'.

be varied..l

4Byreference lto Fig', 2 the N `the blades 41 to produce askive cutisclearfr Y simulating that used when the stock isy cutV manually, butWithout `any of its disad-4 vantages.

Having thus described my invention what I claim and desire to protect byLetters Patent is: n j

l. In a cutter i'or flexible sheet stock, a bed on which the stock issupported in stationary relation, means for cutting the stock intolongitudinal strips, means for varying the angle or' the cut vedge ofthe strips withr respect to the bed, means for relatively moving thecutting means and bed, and means for preventing` buckling of the stockin advance of the cutting means.

2. In a cutter for sheet stock, ay cutting blade, means for supportingsaid blade in operative relation to the sheet of stock, means forvaryingthe cutting angle of the blade both with respect to the line ofcut and laterally, and means whereby the blade and sheet may berelatively moved.

3. In a cutter for sheet stock, a support, a blade pivotally carriedthereby.I means for adjusting the blade laterally and longitudinally,means for moving' the support into either operative or inoperativerelation to the sheet of stock, means for exerting pressure on theblade, and means whereby the support and sheet may be relatively movedto cut the sheet.

4f. In a cutter for sheet rubber stock, an impertorate bed for thestock, means movable thereon including a plurality of knives cooperatingtherewith. for simultaneously cutting the stock into parallel stripswith skived edges, and means Jfor varying the length of cutting edge ofsaid knives in contact with the stock.

5. In a cutter for sheetrubber stock, an imperforate bed, means coactingltherewith for simultaneously cutting a sheet of stock into a pluralityof slived edge strips, means `for varying the cutting angle of the edgeof said means and the pressure of said edge, and means whereby the width`of the strips may be varied.

6. In a cutter 'for sheet stock, means for simultaneously cutting asheet of stock into parallel strips with slrived edges, means .for

varying the angle of the skive, means for resiliently maintaining thecutting means in contact with the stock, and means for varying thepressure of the cutting means on the stock.

7. In a cutter for sheet rubber stock, a

plurality of edged means for cutting a sheet of stock intojparallel.strips with skived edges, an impertorate l bed j coacting therewith,means for varying the angleoil the i shive, yand adjustable means forsimultaneously moving thek cutting means to and from operative position;

8. In a cutter kfor sheetk stock, plurality n of cutter blades, meansfor giving each blade y an angular movement in two directions withrespect to the stock, means for giving them a collectiveV adjustment,and means fory multaneously moving them toward or .from

operative position. v ,j

9. In a cutter for sheet stock, a bed for the stock, a cutter blade,means for yield-y ingly depressing the blade, means whereby the blademay be moved to operative orinoperative sposition, means for adjustingl' said last means, means for varying the cutting angle of the blade,and means whereby the blade and stock may be'relatively moved.` l 10. Ina cutter for sheetstock, a plurality ofmovable cutting blades,imeans.ioradjustably mounting said blades by their rear ends i in draw cuttingposition, means for exerting cutting pressure on said blades, means fori,

varying the pressure on the individual blades, and means for limitingthe cutting y movement of said blades.

1l. In a cutter for sheet stock, a-plurality of cuttingblades, means.for adjusting said blades angularly in a pluralityy of directions, meansfor exerting cutting pressure on said blades, means for varying thepressure on the individual blades, and meansfor 'simultaneouslymovingfsaid blades to and from cutting position.

12. In a cutter for sheet stock, a plurality of longitudinally andangularly adjustable cutting blades, means for exerting cutting pressureon said blades,`means for varying the pressure on the individual blades,means for relatively adjusting` the blades, and

means for simultaneously moving said blades to and from cuttingposition.

means for yieldingly urging the cutter to- .13. In a cutter vfor sheetstock, a fiat bed for the stock, means for supporting a cutter, j

ward cutting position, means ior limiting such movement of the cutter,and independor inoperative.

yent means for rendering the cutter operative 14. In a cutter forsheetstock, a work bed, I

a cutting 4element cfa-operating therewith,`

means whereby the cutting element may be pivotally mounted, and meansywherebythe cutting element may be rotatably adjustedf on an axis atright angles toits pivotal l mounting. V f

l5. In a cutter for sheet stock, a plurality of angularly adjustable andpivotally mounted blades, means for simultaneously moving them to andvfrom cutting position, means orapplying cutting' pressure t0 the blades,means for individually varying the pressure on the blades, and meanswhereby the blades and the material* to be eut may be relatively moved.

16. In a cutter for' sheet stock, al eut/ting 'ments adjustably mountedon the carriage,

and means kfor tensioning the stonk in advance of the Cutting elements.

18. In a cutter i'or sheet stock, a cutting vbed for the steelt acarriage ada ted to travel thereover, a. plurality of Cutting elementsadjustably mounted on the Carriage, adjustable means't exerting cuttingpressure on the cutting elements, and mea-ns for tensioning the stock inadvance of the cutting elements.

19. In a cutter for sheet steek, a bed for the stock, a carriage movableover the bed7 a Cutter blade pivotally mounted on the Carriage, meansfor yieldingly depressing the blade, means for' raising and lowering theblade, and means whereby the angle ot' engagement of the blade` with thesteelt may be varied.

20. In a cutter for sheet stock, ak bed, a carriage movable thereover, amember mov ably supported transverselytherein, means Jfor moving saidmember toward and from the bed, adjustable means' 'for limiting themovement of the member', and a cutter blade mounted on' the member.

21. ln a Cutter for sheet stock, a. bed, a carriage movable thereover,a'member mov ably supported transversely therein, means for movingtlie'member adjustably connected thereto7 adjustable means for limitingthe movement ot' the member, `a Cutter blade mountedY on the member,and` means for yieldingly urging the blade toward the bed.

22. ln a cutter for sheet stock, a carriage, a bar movably supported'therein, means for moving the' bar, a eut-ter blade mounted on the bar,means for transversely vand longitudinally varying its cutting angle,and means for exerting a yielding Cutting pressure on the blade.

23.` ln a cutter for sheet stock, a bed, a carriage' movable thereover,a kbar movably supported therein, means for moving the bar7 adjustablemeans for limiting the movei ment of the bar, a pl'urality oil cutterblades adjustably mounted on the bar, andv indin vidual means foryexerting*cutting pressurev on'the blades.

24. In ai cutter for 'sheet steek,V a bed for the stock, aearriagemo'vable on' said bed, a plurality of cutter bla/des pivotallysupported on saidl carriage, means for adjusting the pivotal support oilthe blades toward or from the bed,I and means for yieldingly holid ingthe blades in engagement with the stock astheearriage is moved over thebed.

25. In a cutter for sheet steek', a bed for i the stock, a. Carriagemovable on said bed',

a plurality of bla-des mounted on' said early riage and disposed to'make a skive out,

means for varying theA angle of said skive eut, andy means foryi'eldingly holding the blades in engagement with thestock' as thelcarriage is movedoverthe bed'.

2b. ln a cutter for sheet stock, a bed for the stock, a Carriage, a`plurality of cutterl blades pivotally carried' thereby, means forraising and lowering thepivotal points of the blades, means whereby theblades may be relatively adjustedV means for varying the Cutting angleof the blades, means for varying the cutting pressurel of the blades,

and means tor moving the blades to yopera'- tive or inoperativeposition'.

27. ln a cutter' for sheetstoek, a bed, a. carriage movable thereover, abar movable in said Carriage, means ilo-r moving' the bai" to either oftwo positions, means for adjustably connecting the bar and its movingmeans, a plurality of eutter blades pivotally mounted on saidY bar-5adjustable means for holding the blades in spaced; relation,.mea`ns foryieldingly depressing the blades, and

means or varying the cutting angle of the the carriage cooperating withsaid bed and rolls.

Signed at Passaic, N. J., this 16th day oit April, i920. i

HENRY Z. COBB'.

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